Investigations on the suitability of rice bran oil and corn oil as alternative insulating liquids for transformers

Kumar, Sunil; Iruthayarajan, M. Willjuice; Bakrutheen, M.

doi:10.1002/tee.22182

Cited by 21 publications

(13 citation statements)

References 16 publications

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“…Kumar et al concluded that rice bran-based liquids indicate appropriate features such as BDV, flash point, fire point and resistivity; however thermal and other electrical characteristics are required to be improved. Palm oil has been deliberated as liquid insulation for transformers, specifically in certain states of Asia and Africa [ 143 ]. Abdelmalik made efforts to enhance the oxidation stability of palm kernel oil by chemical adjustment through the esterification reaction.…”

Section: New and Innovative Technologies For Environmentally Frienmentioning

confidence: 99%

Sustainable, Renewable and Environmental-Friendly Insulation Systems for High Voltages Applications

et al. 2020

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With the inception of high voltage (HV), requisites on the insulating permanence of HV equipment is becoming increasingly crucial. Mineral/synthetic oil liquid insulation—together with solid insulation materials (paper, pressboard)—is the fundamental insulation constituent in HV apparatuses; their insulation attributes perform a substantial part in a reliable and steady performance. Meanwhile, implications on the environment, scarcity of petroleum oil supplies and discarding complications with waste oil have stimulated investigators to steer their attention towards sustainable, renewable, biodegradable and environmentally friendly insulating substances. The contemporary insulating constituent’s evolution is driven by numerous dynamics—in particular, environmental obligations and other security and economic issues. Consequently, HV equipment manufacturers must address novel specifications concerning to these new standards. Renewable, sustainable and environmentally friendly insulating materials are continuously substituting conventional insulating items in the market place. These are favorable to traditional insulating materials, due to their superior functionality. The also offer explicit security and eco-friendly advantages. This article discusses cutting-edge technology of environmentally friendly insulating materials, including their fabrication, processing and characterization. The new renewable, insulating systems used in HV equipment are submitted and their fundamental gains stated in comparison with conventional insulating materials. Several experimental efforts carried out in various parts of the world are presented, offering an outline of the existing research conducted on renewable insulating systems. The significance of this article lies in summarizing prior investigations, classifying research essence, inducements and predicting forthcoming research trends. Furthermore, opportunities and constraints being experienced in the field of exploration are evidently reported. Last but not least, imminent research proposals and applications are recommended.

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Section: New and Innovative Technologies For Environmentally Frienmentioning

confidence: 99%

Sustainable, Renewable and Environmental-Friendly Insulation Systems for High Voltages Applications

et al. 2020

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“…In fact, in the supercritical CO 2 state, the active site of the lipase was protected, the temperature tolerance of the enzyme was increased. The viscosity of rice bran oil was reduced by about 12% (Kumar, Iruthayarajan, & Bakrutheen, ). The mass transfer rate was accelerated and then it increased the esterification rate (Uddin et al, ).…”

Section: Resultsmentioning

confidence: 99%

Enzymatic esterification of rice bran oil and phytosterol in supercritical CO ₂

Wang

Tang

et al. 2019

J Food Process Preserv

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In this paper, the esterification of phytosterol and free fatty acids (FFA) in rice bran oil (RBO) was studied using Novozym 435 in supercritical CO2. It was found that with the increase in CO2 filling pressure, the esterification reaction rate also increased. When the pressure exceeded the critical point, CO2 fluid had a great effect on phytosterol conversion. Therefore, enzymatic esterification deacidification was studied when the CO2 filling pressure was 8.0 MPa, the results showed that when the lipase dosage was 3.0%, the phytosterol concentration was 18.0%, the molecular sieve addition was 10.0%, and the esterification temperature was 78°C, after 41 hr the FFA content of RBO decreased to 1.1%, the phytosterol conversion rate reached 93.2%, and the vitamin E (VE) retention in the product was 80.0%. Therefore, the esterification by Novozymes 435 in supercritical CO2 could have several applications in fats and oils industry. Practical applications Much research has been done on the interesterification of vegetable oil in order to produce edible fats and oils. The current study provides a reliable and simple method for the esterification of phytosterol and free fatty acids (FFA) in rice bran oil (RBO). The optimal operating conditions lead to high quality oil. The FFA content of RBO decreased to 1.1%, the phytosterol conversion rate reached 93.2%, and the VE content in the product was 80.0%. The esterification by Novozymes 435 in supercritical CO2 could be applied in fats and oils industry.

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“…Tensile strength was measured using Universal Testing Machine (UTM) according to the IEC 60554 standards. A paper strip was clamped at each end between two jaws, and an increasing load was applied causing the clamps to move apart until the strip breaks at a certain loading condition [36].…”

Section: G Prediction Of the Tensile Strength Of The Papermentioning

confidence: 99%

Optimization of Various Natural Ester Oils Impregnated Nomex Paper Performance in Power Transformer Applications under Different Ageing Conditions

Kumar*¹,

Moshi²,

Bharathi³

et al. 2019

IJRTE

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Vegetable oils are being considered as the potential replacements to mineral oils because of their better natural execution and for their high fire point. In spite of the fact that these fluids have been utilized as a part of appropriation transformers, it is as yet a huge advance to receive vegetable oils in control transformer because of high cost and abnormal state of well being and unwavering quality required in benefit for these units. Vegetable oils such as honge oil (HO), neem oil (NO), mustard oil (MO), punna oil (PO) and castor oil (CO) offer the reasonable option for mineral oil. It is expected that the greater part of the un-matured oil could fulfil the base necessity of dielectric protection fluids in the transformer. This paper concentrated on the impact of maturing on the electrical and physicochemical properties of HO, NO, MO, PO and CO. Fixed maturing tests have been set at 90°C for 30 days, 60 days and 90 days. Prior to the maturing procedure, the examples were dried in a vacuum broiler under the pressure of 0.8kPa at 85°C for 48 hours keeping in mind the end goal to evacuate the dampness content in the oils. At that point, the oils were impregnated with the Nomex paper and keep on ageing for choosing the span time. The electrical properties (relative permittivity, dielectric misfortunes, resistivity and breakdown quality), mechanical properties (thickness and elasticity) and substance properties (dampness and corrosiveness) of the oils were estimated all through the maturing time frames. It can be reasoned that the research center quickened warm maturing test uncovers that every single vegetable oil in this examination are safe towards oxidation in light of the steady thickness and low corrosiveness estimations of vegetable oils all through the maturing term even with the nearness of oxygen. The AC breakdown voltages of vegetable oils can in any case conform to the prescribed furthest reaches of new Vegetable oil set by ASTM 6781 even after subjected to maturing. From the results, it may be concluded that the proposed vegetable oils can be used as the alternatives for mineral oil.

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Investigations on the suitability of rice bran oil and corn oil as alternative insulating liquids for transformers

Cited by 21 publications

References 16 publications

Sustainable, Renewable and Environmental-Friendly Insulation Systems for High Voltages Applications

Sustainable, Renewable and Environmental-Friendly Insulation Systems for High Voltages Applications

Enzymatic esterification of rice bran oil and phytosterol in supercritical CO ₂

Optimization of Various Natural Ester Oils Impregnated Nomex Paper Performance in Power Transformer Applications under Different Ageing Conditions

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Investigations on the suitability of rice bran oil and corn oil as alternative insulating liquids for transformers

Cited by 21 publications

References 16 publications

Sustainable, Renewable and Environmental-Friendly Insulation Systems for High Voltages Applications

Sustainable, Renewable and Environmental-Friendly Insulation Systems for High Voltages Applications

Enzymatic esterification of rice bran oil and phytosterol in supercritical CO 2

Optimization of Various Natural Ester Oils Impregnated Nomex Paper Performance in Power Transformer Applications under Different Ageing Conditions

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Enzymatic esterification of rice bran oil and phytosterol in supercritical CO ₂